US5247015AExpiredUtility
Molded thermoplastic elastomer
Est. expiryDec 22, 2008(expired)· nominal 20-yr term from priority
Inventors:Ghawamedin Bayan
B65D 51/002B01L 3/50825C08L 23/283A61J 1/1468
79
PatentIndex Score
59
Cited by
11
References
1
Claims
Abstract
A molded thermoplastic elastomer having a compression set less than about forty percent, an oxygen transmission rate of less than 500 cc/m 2 /day, a moisture vapor transmission rate of less than 2 gm/m 2 /day, and a needle penetration force of less than 2000 grams.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. A molded thermoplastic elastomer composition consisting essentially of a dispersed phase of a halobutyl rubber fully cross linked by dynamic vulcanization in the presence of at least 20 parts of a continuous matrix of a mixture formed from 10 to 60 parts of polypropylene and 1 to 90 parts of a thermoplastic elastomeric block copolymer having terminal polystyrene units and olefinic elastomeric mid block units, said parts being based upon 100 parts of said rubber, said composition having a compression set less than about forty percent, an oxygen transmission rate of less than 500 cc/m 2 /day, a moisture vapor transmission rate of less than 2 gm/m 2 /day, and a needle penetration force of less than 2000 grams.Cited by (0)
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